Attachment for surfacing-machines.



1%. 791,237. PATEMBD MAY 30, 1905.

- W..o. AVERILL.

ATTACHMENT FOR SU'RFAOING MACHINES.

APBLIOATION PILEDAUG. 9, 1904.

ATTORNEYS WITNESSES:

v UNITED. STATES Patented May 30, 1905.

PATENT OF ICE.

' ATTACHMENT FOR SURFAOING-MACHINES.

SPECIFICATION formingpart of Letters Patent No. 791,237, dated. May 30,1905. Application filed Anjguist 194904. Serial No. 22 7- To all whom,it may concern:

Be it known that I, WARREN O. AVERILL, a I

' citizen of the United States, and a resident of Attachment forSurfacing-Machines of which carrying the tool.

the following is afull, clear, and exact description.

The invention relates to means for manipulating thetool on astone-surfacing or equivalent machine. v

The special object of the invention is to enable the tool to be guidedso as to strike the stone exactly on the desired spot and also 'to beturned so as to dispose the edge of the tool, and consequently the outthereof,-in any desired position with respect to the edges of the stone.I attain this object by providing a peculiar guide connected with ashiftable part of the finishing-machine, this part movably On the guideis arranged a handle, by means of which said part of thefinishing-machine may be shifted through the medium of the guide, andsaid handle has a connection directly with the tool, thereby enablingmovement of the handle independently of the guide to impart to the toolan independent movement.

Theinvention residesin certain novel features of construction andrelative arrangement of elements, as will be fully set forthhereinafter, and particularly pointed out in the claims. I 7

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar charactersof reference indicatecorresponding parts in both figures.

Figure 1 is a perspective view-of the invention, showing, as an example,its application to a pneumatic finishing-machine, this view illustratingthe cylinder of the machine, the tool, and .its stem movable in thecylinder, as well as the guide, the handle, and the connection betweenthe handle and the tool; and Fig. 2 is a reduced side elevation of thesame parts, showing their positions relatively to the surface beingoperated upon.

(1 indicates the cylinder of the pneumatic surfacing-machine, and b thesurfacing-tool. Said tool I) has its stem 1) serving as a pistonrod,this rod passing through'a stuffing-box at at the lower end of thecylinder, by which means a reciprocating movement may be imparted to thetool, thereby causing it to strike the surface of the stone. Accordingto the example of the invention here given the cylinder is mounted toswing, so that the position of the tool with reference to the stone maybe changed, thus covering the entire surface of the latter.

At its lower end the cylinder (1 is provided with anannular flange orprojectionc, to which is fastenedfor instance, by means of the tie-rodse'the above-referred-to guide. This 'guidecomprises a circular main partor guide proper, (1, extending concentrically around thecylinder andcombined with the flange through the medium of arms d, which,

as here shown, extend slightly downward and thence inward to the flan e.A handle is arranged to slide freely on t e guide at and comprises aU-shaped main part f with hooks f at the ends of its limbs, thesehooksengaging the guide and havingfastened thereto a resilient pad f whichenables the handle to be grasped by the operator Without subjecting theoperator to the annoyance and injury 00- casioned by the constantvibration of the ma chine. At its lower or middle part the main part fhas a depending hook f with which is connected the bendg of an arm g,said arm being here shown as formed of a rod bent doubly and. the end ofthis rod being preferably connected to the tool, as shown.

In the operation of the device the tool is reciprocally driven againstthe stone in the usual manner, and the cylinder a, with its attachedparts, may be swung bodily over the the handle on the eccentric guide d.It

therefore follows that bymeans of my invention the operator mayconveniently control the operation of the tool in any manner desired.

Various changes in the form, proportions, and minor details of myinvention may be re sortedto without departing from the spirit and scopethereof. I consider myself entitled to all such variations as may liewithin the scope of my claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination with a shiftable part of asurfacing-machine and with a driven tool carried relatively movablethereby, of a circular guide in connection with said part of thesurfacing-machine, a handle movable thereon, and a connection betweenthe guide and the tool.

2. The combination with .a shiftable part of a surfacing-machine andwith a driven tool carried relatively movable thereby, of a circularguide in connection with said part of the surfacing-machine, a handlemovable thereon, and an arm having pivotal connection with the handleand with the tool.

3. The combination with a shiftable part of a surfacing-machine andwitha driven tool carried relatively movable thereby, of a guide inconnection with the said part of the surfacin -machine, a handle havin acushion, the handle being movable on the guide, and1 a connectionbetween the handle and the too 4. The combination with a shiftable partof a surfacing-machine and with a driven tool carried relatively movablethereby, a guide in connection with the said part of thesurfacing-machine, a U-shaped handle having hooks movably engaged withthe guide, a pad in connection with the handle for the purposespecified, and a connection between the handle and the tool.

5. The combination with the pneumatie cylinder of a surfacing-machine,and the tool carried and driven thereby, said tool being axially movableindependently of said cylinder, of a guide in connection with thecylinder, a handle movable 011 the guide, and a connection between thehandle and the tool.

6. In a surfacing-machine the combination with a reciprocal tool andmeans for mounting the same, said tool being capable of turningindependently of said means, of a guide in connection with said means, ahandle movable on the guide, and a connection between the handle andtool for the purpose specified.

In testimony whereof vI have signed my name to this specification in thepresence of two subscribing witnesses.

WARREN C. AVERILL.

Witnesses:

DARIUS K. DRAKE, GEO. B. HUGHES.

